i am working on agglomerative hierarchical clustering in MATLAB,,

cluster analysis is found under Multivariate Statistics under Statistics Toolbox in MATLAB,

there is a built-in function "inconsistent" in MATLAB,,, i can not understand the purpose of this function , i mean the inconsistency coeff values that this function returns as a last column in I vector; how to interpret these coeff values to apply a threshold over dendrogram, plus what is the significance of "depth" as an input parameter to the next version of "inconsistent" function ??? and how to use/calculate the depth from a dendrogram ??
if anyone can just help me out, that will be really appreciated
thanks in advance